chore: add 'set -e' to every nomarchy-* bash script that lacks it

Sweep across the three script directories: features/scripts/utils,
core/system/scripts, themes/engine/scripts. 142 of 169 bash scripts
gained `set -e`; 27 already had it; the one Python helper
(nomarchy-haptic-touchpad) was skipped via shebang detection.

Why: bash's default behavior is to continue past a failed command,
which means a script that does "do A; do B; do C" leaves the system
in a half-applied state when B fails - and the user gets no signal.
Several recent fix commits (theme partial-apply, waybar reload race,
installer prewipe silent failures) all trace back to this. set -e
turns silent corruption into a loud abort the user can act on.

The 11 scripts with explicit `|| true` markers stay safe under set -e
because || true coerces the exit to zero; the markers continue to
mean "I deliberately tolerate this failure here."

Deliberate exception: nomarchy-menu runs WITHOUT set -e. It is an
interactive UX loop where action branches do `cmd; back_to <self>`
so a failed action would abort the script under set -e and the menu
would disappear without feedback. Soft-failure - menu re-displays,
user picks again - is the right semantic. Documented inline.

Validation: bash -n on every modified script (zero failures). The
new pre-commit hook (27f5663) was just updated to filter by shebang
so it doesn't try to bash-syntax-check the Python helper - that
filter was uncovered by this sweep.

Risk: set -e can surface latent bugs in scripts that previously
relied on silent continuation. If anything breaks, it's a real bug
that was already broken and is now visible. Easy per-script revert
if any UX glitches show up.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

core/system/scripts/nomarchy-battery-capacity

@@ -1,4 +1,5 @@
 #!/bin/bash
+set -e
 
 # Returns the battery full capacity in Wh (rounded to whole number).
 # Used by nomarchy-battery-status for displaying battery capacity.

core/system/scripts/nomarchy-battery-monitor

@@ -1,4 +1,5 @@
 #!/bin/bash
+set -e
 
 # Designed to be run by systemd timer every 30 seconds and alerts if battery is low
 

core/system/scripts/nomarchy-battery-present

@@ -1,4 +1,5 @@
 #!/bin/bash
+set -e
 
 # Returns true if a battery is present on the system.
 # Used by the battery monitor and other battery-related checks.

core/system/scripts/nomarchy-battery-remaining

@@ -1,4 +1,5 @@
 #!/bin/bash
+set -e
 
 # Returns the battery percentage remaining as an integer.
 # Used by the battery monitor and the Ctrl + Shift + Super + B hotkey.

core/system/scripts/nomarchy-battery-remaining-time

@@ -1,4 +1,5 @@
 #!/bin/bash
+set -e
 
 # Returns the battery time remaining (to empty or full) in a compact format.
 

core/system/scripts/nomarchy-battery-status

@@ -1,4 +1,5 @@
 #!/bin/bash
+set -e
 
 # Returns a formatted battery status string with percentage and power draw/charge.
 # Used by the battery notification hotkey (Ctrl + Shift + Super + B).

core/system/scripts/nomarchy-brightness-display

@@ -1,4 +1,5 @@
 #!/bin/bash
+set -e
 
 # Adjust brightness on the most likely display device.
 # Usage: nomarchy-brightness-display <step>

core/system/scripts/nomarchy-brightness-display-apple

@@ -1,4 +1,5 @@
 #!/bin/bash
+set -e
 
 # Adjust the brightness on Apple Studio Displays and Apple XDR Displays using asdcontrol.
 

core/system/scripts/nomarchy-brightness-keyboard

@@ -1,4 +1,5 @@
 #!/bin/bash
+set -e
 
 # Adjust keyboard backlight brightness using available steps.
 # Usage: nomarchy-brightness-keyboard <up|down|cycle>

core/system/scripts/nomarchy-hibernation-available

@@ -1,4 +1,5 @@
 #!/bin/bash
+set -e
 
 # Check if hibernation is supported
 if [[ ! -f /sys/power/image_size ]]; then

core/system/scripts/nomarchy-hibernation-remove

@@ -1,4 +1,5 @@
 #!/bin/bash
+set -e
 
 # Removes hibernation setup: disables swap, removes swapfile, removes fstab entry,
 # removes resume hook, and removes suspend-then-hibernate configuration.

core/system/scripts/nomarchy-hibernation-setup

@@ -1,4 +1,5 @@
 #!/bin/bash
+set -e
 
 # Creates a swap file in the btrfs subvolume, adds the swap file to /etc/fstab,
 # adds a resume hook to mkinitcpio, and configures suspend-then-hibernate.

core/system/scripts/nomarchy-hw-asus-rog

@@ -1,4 +1,5 @@
 #!/bin/bash
+set -e
 
 # Detect whether the computer is an Asus ROG machine.
 

core/system/scripts/nomarchy-hw-match

@@ -1,4 +1,5 @@
 #!/bin/bash
+set -e
 
 # Match against the computer's DMI product name (case-insensitive).
 # Usage: nomarchy-hw-match "XPS"

core/system/scripts/nomarchy-hw-vulkan

@@ -1,4 +1,5 @@
 #!/bin/bash
+set -e
 
 # Detect whether Vulkan is available.
 

core/system/scripts/nomarchy-pkg-add

@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+set -e
 
 PKG_NAME="$1"
 

core/system/scripts/nomarchy-pkg-remove

@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+set -e
 
 PKG_NAME="$1"
 

core/system/scripts/nomarchy-powerprofiles-list

@@ -1,4 +1,5 @@
 #!/bin/bash
+set -e
 
 # Returns a list of all the available power profiles on the system.
 # Used by the Nomarchy Menu under Setup > Power Profile.

core/system/scripts/nomarchy-preflight-migration

@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+set -e
 # Nomarchy Pre-flight State Migration
 # Migrates legacy state files into the unified state.json before Nix evaluation
 

core/system/scripts/nomarchy-restart-bluetooth

@@ -1,4 +1,5 @@
 #!/bin/bash
+set -e
 
 # Unblock and restart the bluetooth service.
 

core/system/scripts/nomarchy-restart-pipewire

@@ -1,4 +1,5 @@
 #!/bin/bash
+set -e
 
 # Restart the PipeWire audio service to fix audio issues or apply new configuration.
 

core/system/scripts/nomarchy-restart-trackpad

@@ -1,4 +1,5 @@
 #!/bin/bash
+set -e
 
 # Reload the intel_quicki2c driver to fix a dead trackpad.
 # The THC (Touch Host Controller) can fail to initialize interrupts

core/system/scripts/nomarchy-restart-wifi

@@ -1,4 +1,5 @@
 #!/bin/bash
+set -e
 
 # Unblock and restart the Wi-Fi service.
 

core/system/scripts/nomarchy-restart-xcompose

@@ -1,4 +1,5 @@
 #!/bin/bash
+set -e
 
 # Restart the XCompose input method service (fcitx5) to apply new compose key settings.
 

core/system/scripts/nomarchy-setup-dns

@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+set -e
 
 # Configure DNS declaratively for Nomarchy NixOS.
 # Hybrid: updates /etc/nixos/state.json and runs sys-update.

core/system/scripts/nomarchy-setup-fido2

@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+set -e
 
 # Configure FIDO2 support declaratively for Nomarchy NixOS.
 

core/system/scripts/nomarchy-setup-fingerprint

@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+set -e
 
 # Configure fingerprint support declaratively for Nomarchy NixOS.
 

core/system/scripts/nomarchy-sudo-keepalive

@@ -1,4 +1,5 @@
 #!/bin/bash
+set -e
 
 # Prompt for sudo once and keep the credential alive in the background.
 # Source this script so the trap applies to the calling shell:

core/system/scripts/nomarchy-sudo-passwordless-toggle

@@ -1,4 +1,5 @@
 #!/bin/bash
+set -e
 
 # Toggle passwordless sudo for the current user.
 # First run: enables passwordless sudo for 15 minutes (after confirmation).

core/system/scripts/nomarchy-sudo-reset

@@ -1,4 +1,5 @@
 #!/bin/bash
+set -e
 
 # Reset the sudo lockout/faillock for the current user.
 # This clears any failed authentication attempts that may have locked the user out.

core/system/scripts/nomarchy-swayosd-brightness

@@ -1,4 +1,5 @@
 #!/bin/bash
+set -e
 
 # Display brightness level using SwayOSD on the current monitor.
 # Usage: nomarchy-swayosd-brightness <percent>

core/system/scripts/nomarchy-swayosd-kbd-brightness

@@ -1,4 +1,5 @@
 #!/bin/bash
+set -e
 
 # Display keyboard brightness level using SwayOSD on the current monitor.
 # Usage: nomarchy-swayosd-kbd-brightness <percent>

core/system/scripts/nomarchy-system-logout

@@ -1,4 +1,5 @@
 #!/bin/bash
+set -e
 
 # Logout command that first closes all application windows (thus giving them a chance to save state),
 # then stops the session, returning to the SDDM login screen.

core/system/scripts/nomarchy-system-reboot

@@ -1,4 +1,5 @@
 #!/bin/bash
+set -e
 
 # Reboot command that first closes all application windows (thus giving them a chance to save state).
 # This is particularly helpful for applications like Chromium that otherwise won't shutdown cleanly.

core/system/scripts/nomarchy-system-shutdown

@@ -1,4 +1,5 @@
 #!/bin/bash
+set -e
 
 # Shutdown command that first closes all application windows (thus giving them a chance to save state).
 # This is particularly helpful for applications like Chromium that otherwise won't shutdown cleanly.

core/system/scripts/nomarchy-toggle-hybrid-gpu

@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+set -e
 
 # Toggle dedicated vs integrated GPU mode via supergfxd (for hybrid gpu laptops, like Asus G14).
 # Declarative enablement + Runtime mode switching for Nomarchy NixOS.

core/system/scripts/nomarchy-toggle-idle

@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+set -e
 
 # Toggles the idle daemon (hypridle) between enabled and disabled.
 # Hybrid: updates state.json and provides instant feedback.

core/system/scripts/nomarchy-toggle-suspend

@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+set -e
 
 # Toggles the suspend menu option availability.
 # Hybrid: updates state.json and runs env-update for persistence.

core/system/scripts/nomarchy-tz-select

@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+set -e
 
 # Select system timezone declaratively for Nomarchy NixOS.
 

core/system/scripts/nomarchy-update-time

@@ -1,4 +1,5 @@
 #!/bin/bash
+set -e
 
 echo "Updating time..."
 sudo systemctl restart systemd-timesyncd

core/system/scripts/nomarchy-wifi-powersave

@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+set -e
 
 # Toggles wifi power saving declaratively.
 # Usage: nomarchy-wifi-powersave <on|off>